Elevator-lock.



' glgESSEQ GJLOCKHART.

ELEVATOR LOCK. APPLICATION man mAYio. 1911.

Patenfed July 18, 1916;

INVENTOI? M J. Mme/m r/ .11 M

mom/Er rm: NORRIS PETERS cm, WASHINGTON, n. c.

GEORGE LOGKHART, OF NEW YORK, N. Y.

ELEVATOR-LOCK.

Application filed May 10, 1911.

citizen of the United States, and resident of the city, county, andState of New York,

have invented certain new and useful Improvements in Elevator-Locks, ofwhich the following is a specification.

The invention has for its object the closer and more positive control ofan elevator car, particularly when the car is at rest at a floor, eitherdischarging or taking on passengers or freight.

In my previous application filed on or about the 13th day of February,1911, and bearing Serial #608,463, I have shown a means for mechanicallyretaining a car in a predetermined position. In this application I haveenlarged upon that idea making the device much more complete and simpleof operation and making it perform other functions in addition to thoseset forth in that application.

One of the important new functions is to forbid the putting on of thepower while the car is locked in position, which I do in a very simpleway as will be described, and another is the control of the landing dooras well as the car door, which will also be set forth in fullest detail.

Other new and useful improvements will be enumerated as thespecification progresses.

The following is what I consider the best means of carrying out thisinvention.

The accompanying drawingsform a part of this specification, in whichFigure 1 shows in plan, an elevator car and a portion of one of thelandings and landing gates. Fig. 2 is in elevation,.viewed in thedirection of the arrow 2, in Fig. 1. Fig.3 is in elevation, viewedin'the direction of the arrow 3, in Fig. 1. Fig. 4 is in plan, a Viewshowing a car of a different construction than that shown in Fig. 1, theoperating mechanism being on the opposite side and the gate opening froma difierent point. Fig. 5 is in elevation, viewed in the direction ofthe arrow 5, in Fig. 4. Fig. 6 is in elevation, viewed in the directionof the arrow 6, in Fig. 4, though showing a somewhat difierentconstruction. Fig. 7 shows in detaila part removed, the same being on aSpecification of Letters Patent.

Patented July 18, 1916. Serial No. 626,145.

larger scale. Fig. 8 shows on a larger scale the latches used in thearrangement shown in Figs. 1 and 2.

Similar reference numerals indicate like parts in all the figures wherethey appear.

In applying my device to the standard elevator cars, I have found that asingle construction or design would not work well on all of thedifferent types of elevators. I have also found that the changesnecessary although not involving new matter to any great extent requiressuch a re-arrangement of the parts as to make a single showing andsingle description of the details IlIlSl'lffiClGIlt. I have thereforeshown in the drawing the device, the subject of this invention, securedto, and operable with two different types of cars, the one shown in Fig.1, having the controlling means at the right hand, and having thelanding doors opening from right to left, and the one shown in Fig. 4having the controlling means at the left hand, the landing doors openingfrom right to left, and provided with car doors also opening from rightto left.

Now referring to the figures, 1 indicates the floor of a car, and at 2the landing floor is shown. The elevator shaft in which the car operatesis inclosed by means of the grill work 8 orby any other suitablemeans,-and a door 4 which may be a single door, as shown in Fig. 1,provides a means for passage into or from the elevator shaft.

The caris operated and controlled by the lever member 28 and may beprovided with a folding gate or door 6, all of the ordinaryconstruction.

An upright 7, carried by the car and supported between the floor androof of the car, carries an extension or shoe 8. The upright 7 ispivotally mounted in its supports and may be rotated through a part of arevolution, so as to project the outwardly extending end 9 of theshoe 8,over a landing floor 2. To turn the shoe into place itis necessary toraise the car to the level of the floor, or to a height that will allowthe ball end 10 of the pin 11, to pass freely over the floor. The pin 11is reciprocally mounted in the shoe 8, and remains downward to an extentlimited by the collar1 2, by its own weight and gravity. This pininsures that the car will be raised to the desired height before thedoor is opened, and should the car sink while discharging passengers, orwhile taking them on, the free motion of the pin 10 will not cause theshoe 8 to become jammed upon the floor, or work with a greatfrictionthereon. The upright 7 carries a number of other members whichwill be described as the specification progresses. The upward member 14,supported by the upright 7, has a collar pinned to the upright andextending therefrom an arm 15 which projects on a line parallel totheshoe 8.

Arranged at or near the top of the landing door frame is the duplexlocking means comprising the latches 16 and 17, both operable by theprojection 15. The inner latch 16 engages the pin 18 when the door isclosed, securing the door in position, and the latch 17 rests upon thepin 18. When the arm 15 is rotated under these two latches it lifts thelatch 16 thus freeing the door, and as soon as the door is movedcarrying with it the pin 18, the latch 17 drops so that the notch 19engages the arm 15, securing it in position until the door returns andthe pin 18 lifts the latch 17 and frees the arm. The door is not securedhowever until the arm 15 is rotated from its contact with the latch 16,allowing it to drop so that its notch 20 will engage the pin 18. The arm15 should be fiat, or if round of sufficient diameter so as not toengage in the notch 20. Another member carried by the upright 7, thoughnear the base thereof is the arm 22, and pivotally engaged with the arm22 is the link 23. A bell crank 24, supported by the lug 25 is connectedto the link 23 and carries on its other arm a pin 26. The partialrotation of the upright 7 through the arm 22, link 23 and bell crank 24,reciprocates the pin 26 in and out through a perforation in the guidecasting 27, which supports and guides the upwardly extending operatinglever 28. The lever 28 is also provided with a perforation in registerwith the perforation in the guide casting so that when the pin 26 isreciprocated inward, it must pass through the perforation in the levermember 28.

It will be seen from the construction just described that when the caris stopped at a floor, and the shoe is rotated so as to project outwardover the floor, the latch of the landing gate will be released, nothowever before the power operating means has been securely locked, andit will be seen that as soon as the gate is open, even to a smallextent, the shoe and the operating lever will be securely locked inposition to remain so until the gate is returned to a fully closedposition.

To expedite the return of the gate to its fully closed position, I havearranged the peculiar counterweight shown in each of the figures assecured to the gate, by means of the pivot 30. The counterweightconsists of the bowed arm 31, rotatably mounted upon the pivot 30 andcarrying at its other end a properly weighted wheel 32. To operate thegate the arm 31 must be lifted to a small extent away from itsengagement with the stop 33. The gate can then be pushed open, the wheel32 running on the side wall of the elevator shaft or on a track providedfor it. I prefer that it shall have an independent track because I havefound that the device operates more conveniently if the upper end of thetrack be lifted slightly from the plane, so that the wheel 32 will beforced outward while traveling upward, then when the door is pressedbackward to the full extent' there will be no forward pressure from thewheel 32, because it has reached the center of the pivot 30.

The construction shown in the remaining figures although somewhatdifferent from that just described is about the same in its operationalthough as the numerous changes may make it less easily understood, Iwill describe it in detail. The operator standing at the left of thecar, in easy reach of the ban dle 28, on the lever 28, would find itinconvenient to reach the ordinary operating handle 7' at mid-height of,and secured to the upright 7, for the purpose of rotating the upright 7and the parts carried thereby. I have therefore provided a lever 35,very similar to the operating lever 28, though provided with aprojecting pin 36 at its lower end. The upright 7 is provided with anextension through the car and a right angled pin 37 is, by means of thelink 38, connected to the pin 36, and is operated thereby. The link 23is in this instance connected to the pin 36, and when the car hasreached a floor the operator bringing the lever 28 to a central positionto stop the car, pulls the lever 35 to the right, thereby through thelink 23, bell crank 24, and pin 26, locking the lever 28 in position. Atthe same time the link 38 has revolved the shoe 8, projecting it overthe floor.

Modifications may be made within the scope of the appended claimswithout departing from the principle or sacrificing the advantages ofthis invention.

It is obvious that other combinations or re-arrangement of the parts maybe made as the occasion requires, or peculiarities of design may demand.Such a re-arrangement of the parts is shown in Fig. 6, in which theordinary curved arm 31, and

weighted wheel 32 are used to turn a lever upon a pivot 61 by contactingin the upward motion With the pin 62 and in the downward motion with thepin 63. The movement of the lower end of the crank 60 draws forward alink 64 and rocks a bell crank 65 lifting a longer link 66, which inturn rocks the bell crank 67' forcing inward the pin 68, which operatesin a manner similar to the pin 26 to lock the power controlling lever.

Having carefully and fully described my invention what I claim anddesire to secure by Letters Patent is.

1. An elevator lock having means for looking a car at a floor, a secondlocking means operable by thefirst said means for securing the poweroperating mechanism, and a releasing means for the gate, said releasingmeans controlled by and operable with said first locking means as hereinspecified.

2. An elevator lock having an upright, and a shoe carried by saidupright, said shoe being provided with a reciprocating projection forpreventing the operation ofsaid shoe until the car has reached apredetermined position.

3. An elevator lock having an upright, a shoe carried by said upright,and operable over a floor, and an arm carried by said upright, aplurality of locking means oper= ated by said arm and arranged, the oneto secure the door, to be released by said arm, and the other to securethe arm, to be released by said door as herein specified.

1. In an elevator, a car, an upright carried by said car, a shoe carriedby said upright and rotatable therewith, an arm carried by said uprightand arranged at right angles to said. shoe and a link, a bell crank, anda pin connected together and operated by said arm and a powercontrolling means secured by said pin and by the rotation of the uprightas specified.

5. In combination with an elevator car, an upright carried by said car,a shoe carried by said upright and rotatable therewith, an arm carriedby said upright and a link, a bell crank, and a pin connected togetherand operated by said arm and a power controlling means secured by saidpin and by the rotation of the upright as herein specified.

6. An elevator locking means having in combination a car, an uprightcarried by said car, a shoe carried by said upright and rotatabletherewith, said shoe being provided with a reciprocating projection, anarm carried by said upright, a plurality of locking means operable bysaid arm and a second arm, and a power locking means opgraible by saidsecond arm as herein speci- Signed at New York city N. Y. this 24: dayof April 1911, in the presence of two witnesses.

GEORGE LOOKHART.

Witnesses:

G. E. STERRITTE, ARTHUR PHELPS MARR.

Copies of this patent may be obtained for five cents each, by addressingthe "Commissioner of Patents, Washington, D. G.

